More than 13 years after the original towers were
destroyed in 9/11 attacks, New York's World Trade Center has re-opened for
business. The $3.9bn (£2.4bn) skyscraper took eight years to build and is now
the tallest building in the US.
The 104 story skyscraper built after 9/11 as the Freedom
Tower but now simply called One World Trade Center.
